Uhlmann, Ina ; Hawelka, Dominik ; Hildebrandt, Erwin ; Pradella, Jens ; Rödel, Jürgen (2013)
Structure and mechanical properties of silica doped zirconia thin films.
In: Thin Solid Films, 527
doi: 10.1016/j.tsf.2012.08.007
Article, Bibliographie
Abstract
Sol–gel based wear resistant coatings are presented as an alternative to existing vapor deposition coatings. The films consist of zirconia which has been doped with 8 wt.% silica. Crack-free single as well as multilayer coatings with thicknesses of 80 and 150 nm, respectively, could be produced after sintering at 1000 °C. The evolution of layer thickness, optical, chemical and mechanical properties during film annealing was investigated by ellipsometry, scanning electron microscopy, thermal gravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction, nanoindentation and micro-abrasion. Micro-abrasion has been established as an easy and powerful tool to achieve first comparative abrasion data which could be correlated to hardness, Young's modulus and structure of the films. Above 600 °C a tetragonal, oxide coating with a Young's modulus ranging from 80 to 90 GPa, a hardness from 7 to 8 GPa and an increased abrasion resistance was obtained. The film density reached 4.64 g/cm3 with the mean refractive index n550 nm lying between 1.88 and 1.93.
| Item Type: | Article |
|---|---|
| Erschienen: | 2013 |
| Creators: | Uhlmann, Ina ; Hawelka, Dominik ; Hildebrandt, Erwin ; Pradella, Jens ; Rödel, Jürgen |
| Type of entry: | Bibliographie |
| Title: | Structure and mechanical properties of silica doped zirconia thin films |
| Language: | English |
| Date: | 1 January 2013 |
| Publisher: | Elsevier Science Publishing |
| Journal or Publication Title: | Thin Solid Films |
| Volume of the journal: | 527 |
| DOI: | 10.1016/j.tsf.2012.08.007 |
| Abstract: | Sol–gel based wear resistant coatings are presented as an alternative to existing vapor deposition coatings. The films consist of zirconia which has been doped with 8 wt.% silica. Crack-free single as well as multilayer coatings with thicknesses of 80 and 150 nm, respectively, could be produced after sintering at 1000 °C. The evolution of layer thickness, optical, chemical and mechanical properties during film annealing was investigated by ellipsometry, scanning electron microscopy, thermal gravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction, nanoindentation and micro-abrasion. Micro-abrasion has been established as an easy and powerful tool to achieve first comparative abrasion data which could be correlated to hardness, Young's modulus and structure of the films. Above 600 °C a tetragonal, oxide coating with a Young's modulus ranging from 80 to 90 GPa, a hardness from 7 to 8 GPa and an increased abrasion resistance was obtained. The film density reached 4.64 g/cm3 with the mean refractive index n550 nm lying between 1.88 and 1.93. |
| Uncontrolled Keywords: | Sol–gel, ZrO2, SiO2, Wear, Hardness, Crystal structure, Micro abrasion, Ball cratering |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 07 Feb 2014 10:21 |
| Last Modified: | 07 Feb 2014 10:21 |
| PPN: | |
| Funders: | This work was financially supported by the BMBF (Bundesministerium für Bildung und Forschung, Support Code 13N9661). |
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